DE3410686A1 - Device for maintaining the position of a machine-tool slide relative to a fixed machine part - Google Patents

Abstract

In a device for maintaining the position of a machine-tool slide relative to a fixed machine part, which machine-tool slide can be displaced in a plane defined by an X-axis and a Y-axis, two steering-arm pairs arranged symmetrically to the slide are provided, each pair consisting of two steering arms which are connected to one another in an articulated manner and enclose a right angle and of which in each case one is linked to the slide and the other to the fixed machine part. For the embodiment of the joints, two variants are described. The device can be used, among other things, in machines for the finish-machining of gears.

Description

CARL HUKiTS-I '":"'.'-.:":'"' ■. - '. i-1. _M ..

MaMhlnan undZshnradfabrik euifcH tk Co - '. 1 Γ:. ::! ": March 21 lVo ^ t Mooeac *» r8tr.ae, öMü .-. Ch-u 40 488.00 / 2503 Lf l / wk

Claims

ι l) j device for maintaining the position of a slide of a machine tool, which can be displaced in a plane defined by an X and a Y-axis directed perpendicular thereto, relative to a stationary machine part, characterized in that on two opposite sides of the slide (20) first link arms (51 * 52) are articulated, at the free ends of which a second link lever (55 * 56) is articulated, and that the second link lever (55 * 56) are attached at their other end in a rotationally fixed manner on a common guide rod (59) , which is mounted rotatably and displaceably parallel to the Y-axis in the stationary machine part (l6), the first (5l <52) and the second (55 * 56) handlebar levers enclose an at least approximately right angle in the initial position of the carriage (20) , which lies in a plane defined by the X-axis and a Z-axis directed perpendicular to the X- and Y-axes.

2) Device for maintaining the position of a slide of a machine tool which can be displaced in a plane defined by an X and a perpendicularly directed Y axis relative to a stationary machine part, characterized in that first link arms on two opposite sides of the slide (20) (51 * 52) are articulated, at the free ends of which a second link lever (55,56) is articulated, all joints (67 to 70) being designed as ball joints, and that the second link lever (55,

56) are non-rotatably mounted at their other end on a common shaft (7l) which is parallel to a to the Y-axis directed axis (63) is pivotably mounted in the stationary machine part (l6), the the first (51,52) and the second steering lever (55,56) in the starting position of the carriage (20) at least one include approximately right angles in one of the X-axis and one perpendicular to the X- and Y-axes directed Z-axis is defined plane.

3) Device according to claim 1 or 2, characterized by its use in a machine for fine machining the tooth flanks of toothed workpieces (l) with a rotating, gear-like tool (4), the machine part (swivel plate l4) with a longitudinal guide in which it accommodates ) interacting guide parts (35) of the carriage (20) are rotatable relative to this about an axis (19) parallel to the Z-axis.

Device for maintaining the position of a machine tool slide relative to a fixed machine part

The invention relates to a device for maintaining the posture of an in a through an X and through a plane of displaceable slide of a machine tool defined by a perpendicular Y-axis relative to a fixed machine part.

In various machine tools, a tool head can be pivotably received and moved back and forth Feed slide od. The like. Pivotable added to another machine part, which in turn in turn can be accommodated pivotably in a third part, with all said pivot axes parallel are directed towards each other. The feed slide has no relation to a stationary one, for example to said third part.

From DE-OS ... (patent application P 33 28 177-7) is a device is known in which two parallel guide rods are slidably received in a slide which are connected to each other via a sleeve, which is on a perpendicular to them, in one non-adjustable part of the machine accommodated rod is displaceable. The one when moving the slide each to be overcome friction of rest is relatively large, so that in particular small movements of the Slide cannot always be made with the required precision.

The invention is therefore based on the object of designing a device of the type mentioned at the outset in such a way that that the friction to be overcome when moving the carriage is as low as possible.

The embodiments shown in claims 1 and 2 are proposed as a solution to the problem. Included the embodiment according to claim 2 has even fewer friction elements than that according to claim 1.

A preferred use for such devices is specified in claim 3. With various gear finishing machines, e.g. gear shaving machines, must be between the workpiece to be machined (gear) and the tool in tooth engagement with it, e.g. a shaving wheel, an axis intersection angle can be set, for which purpose the tool head is rotated in the feed slide.

In addition, if, for example, the so-called diagonal method is used, a diagonal angle must be set, which determines the feed direction between tool and workpiece. To do this, the one that receives the feed slide Part are rotated relative to said third part. Since all adjustments are made on parts must be that with the feed slide in are directly connected, but this should not be twisted, sometimes difficulties arise when setting up the machine, as the first angle set is added or subtracted from the second angle must, which easily leads to setting errors. For machines with numerically controlled adjustment, everyone must Angles can be called up, arithmetic operations are to be avoided. It also happens that when setting of the second angle the first is changed again. With the devices according to the invention, these Avoid disadvantages.

~ " ₅ 34106Β6

It has also been suggested (DE-OS 271 ^ 706), Two handlebars each on the machine stand and at right angles to it on one in a constant position relative to the To articulate the machine stand to be held carriage and the free ends of the control arm over a common Connect handlebar plate. The short storage distances within the storage locations enable the requirements the rigidity corresponding to the accuracy only with extremely high manufacturing and assembly costs.

The invention is described below with reference to two exemplary embodiments shown in four figures. Show it

Figure 1 is a three-dimensional representation of the device according to claim 1,

Figure 2 is a three-dimensional representation of the device according to claim 2,

Figure 3 is a partial section through the handlebar lever with the ball joints according to Figure 2,

Figure 4 shows a gear shaving machine in which the device is applicable.

In FIG. 1, a plane is schematically defined in a plane defined by the X axis and the Y axis directed perpendicular thereto movable slide 20 of a machine tool, not shown. At the top it is with one to one to. Z-axis parallel axis 21 rotationally adjustable guide 35 for inclusion in a not shown Machine part provided. On two opposite sides, first link arms are parallel to one another 51 »52 hinged (joints 53.5 * 0, which are connected via joints 57,

58 are connected to second link levers 55156. These second handlebar levers 55 »56 are non-rotatably on a common Guide rod (59) attached, the rotatable (Arrow 6o) and displaceable parallel to the Y-axis in ei-ηem Is added relative to the carriage 20 non-movable part of the machine. This part can be the machine stand or a part rigidly connected to it or a part parallel to that perpendicular to the X and Y axes directed Z-axis displaceable feed slide l6, which will be discussed later. The axis 6l of the Joints 53,54 and the axis 62 of the joints 57,50 lie parallel to the Y-axis, also the axis 63 of the guide rod 59 · The handlebars 51 and 55 and the handlebars 52 and 56 thus lie in through the X and through the Z axes defined planes and form at least approximately right angles in the starting position of the carriage 20. If the carriage 20 is now moved in the said plane by means known and therefore not shown, e.g. in the direction of arrow R to the right in the sense of FIG. 1, then the following happens. The handlebar levers 51,52 remain parallel to each other and to the X-axis. Pivot according to the X-component resulting from the movement R. they the second handlebar lever 55 »56 about the axis 63 in the Direction of arrow 60 counterclockwise, with the first handlebar lever by a corresponding amount by the Axis 61 can be pivoted counterclockwise in the direction of arrow 64. At the same time, the handlebar presses 51 pulls the handlebar 55 or the handlebar 52 pulls the handlebar 56 together with the guide rod 59 corresponding to the Y component resulting from the movement R to the right. The movement takes place in the Direction of arrow R reversed, i.e. to the left in the sense of Figure 1, then all pivoting, pushing and Pull movements in the opposite direction. In all In cases, the handlebars 51,52,55,56 remain parallel

to each other in planes defined by the X and Z axes. A rotation of the carriage 20 about a to the Z-axis parallel axis is prevented by the handlebars and the guide rod 59. The carriage 20 can so change its position relative to the feed slide 16 or the machine frame, but not its position.

A slightly different embodiment is shown in FIG. The arrangement of the carriage 20, its guide 35, the handlebars 51 »52.55» 56 and the machine stand or the The delivery slide 16 corresponds to FIG. 1. The connection between these parts is different. Between the carriage 20 and the control levers 51 »52 on the one hand and between the handlebars 51 »52 and the Handlebar levers 55t5 ^ on the other hand are spherical bearings 67, 68 or 69 * 70 arranged that an inclination of the handlebars 51 »52 relative to slide 20 and to the handlebars 55 »56 allow in any spatial direction. The two handlebar levers 55 »56 are non-rotatably on a common Shaft 71 attached, rotatable about axis 63 parallel to the Y-axis (arrow 60), but not longitudinally displaceable is stored in the machine stand or the feed slide 16.

In the starting position of the carriage 20, the handlebars 51 and 55 and the handlebars 52 and 56 are again in planes defined by the X and Z axes and form at least approximately right angles. It is not there required (not even in the embodiment according to FIG. 1) that the handlebars 51 »52 are horizontal and the handlebars 55, 56 are arranged vertically; these directions can also be reversed.

If the carriage 20 is now moved in the said plane, e.g. in the direction of the arrow R to the right in the sense of the figure 2, then the handlebars 51,52 remain to one another

parallel, but not to the X-axis. They pivot according to the Y component resulting from the movement R in the spherical bearings 69, 70 (arrow 72) and are inclined to the X-axis. At the same time they swivel the second handlebar 55156 about axis 63 in the direction of the arrow 60 counterclockwise, the first handlebars 51,52 by a corresponding amount in the Joint bearings 67,68 in the direction of arrow 73 against Be swiveled clockwise. While the handlebars 55 »56 are only defined by the X and Z axes Planes are pivoted because the shaft 71 is axially fixed, the handlebars 51 * 52 change in the course of the Movement R constantly changes its position to the X, Y and Z axes. If the movement takes place in the opposite direction in the direction of the arrow R, i.e. to the left in the sense of FIG. 1, then the pivoting movements also take place in the opposite direction Direction. In all cases, the handlebars 51.52 remain parallel to one another and in constantly changing planes the handlebars 55 »56 remain in through the X and Z axes defined planes parallel to each other. A rotation of the carriage 20 about an axis parallel to the Z-axis is thus ruled out, so that the carriage 20 is indeed its position relative to the feed carriage in this embodiment 16 or the machine stand, but not its position.

For a better understanding of how the spherical plain bearings are arranged, the installation of the spherical plain bearings 67 »69 in FIG the handlebar lever 51 is shown. The outer rings 75 of the pivot bearings are located in corresponding recesses in the control arm 51 67,69, where they are held in place with retaining washers 77. On bolt 78, which is in a neck 79 of the slide 20 or in the second link lever 55 are screwed in, the spherical inner rings 76 are added, which correspond to the outer rings 75 and

be held by means of screws 8O. This arrangement is only one exemplary embodiment which can be varied as desired. As an example of a machine in which the device of FIGS. 1 and 2 can be used, a gear shaving machine is shown in FIG. K , the application not being restricted to this embodiment. A gear wheel 1 (workpiece) is rotatably accommodated on a bed 11 between tailstocks 12, 13. A feed slide l6 is arranged on a stand 15, which can be displaced perpendicularly parallel to the Z-axis in order to set a center distance a and can be driven with a motor 17 and a spindle l8 for this purpose. A swivel plate lk is received in a circular guide 19 such that it can be rotated about a vertical axis 21. On the underside of the swivel plate l4 a feed slide 20 is attached, which can be pushed back and forth horizontally with respect to the feed slide l6 and the swivel plate I ^ (arrow direction R) for which a motor 22 and a spindle 23 are provided. The feed slide 20 is connected to the feed slide 16 via the above-described arrangements of the handlebar levers 51,52,55,56 in such a way that it cannot be rotated about the axis. It therefore has a guide 35 which can rotate about the axis 21 in the swivel plate lk.

In a curved guide 2k on the underside of the feed slide 20, a cradle 25 is arranged, on which a tool head 27 is received in a round guide 26 such that it can be rotated about a vertical axis 28. In the tool head 27, a shaving wheel k is mounted as a tool so that it can be driven in rotation by a motor 29. The axis 21 and, in the illustrated position of the cradle 25, also the axis 28 run parallel to the Z-axis. They are aligned with one another and lie in the middle plane of rotation 8 of the shaving wheel k.

The cradle 25 with the tool head 27 and the shaving wheel k can be pivoted about an axis 10 in the arch guide 2k. A motor 32 with a worm drive 33 is provided for this pivoting movement Kf to produce a crowned tooth shape. By rotating the tool head 27 about the axis 28, an axis intersection angle between the axis 30 of the shaving wheel k and the axis 31 of the workpiece 1 is set. The axes 30 and 31 lie in mutually parallel planes defined by the X and Y axes are ned. By turning the feed carriage 20 the axis 21, the diagonal angle and thus the feed direction of the shaving wheel 4 is set, if not is to be scraped in parallel (feed direction R lies in the image plane, i.e. parallel to the X-axis), but in the diagonal method (R is inclined to the image plane, i.e. as shown in Figures 1 and 2).

At the feed slide 20, the first guide levers 51,52 are laterally mounted, of which k in figure only one (51) can be seen connected to the second link lever 55 is articulated. The handlebar lever 55 is connected to the feed slide 16 via the guide rod 59 or the shaft 71. If now the feed slide 20 starts a feed movement in a direction determined by the diagonal angle set with the swivel plate Ik. device is to perform, then it follows while maintaining its original position relative to the workpiece axis 31 or relative to the feed slide 16 thanks to its rotatable guide 35 in the predetermined direction (Direction of arrow R). The resulting movements the handlebars 5l »52,55» 56 have already been described above.

List of terms

1 gear 57
58> Joints 10 Swivel axis 59 Leadership s t ang e 11th bed 6o Direction of rotation 12th
13 » Tailstock 6i
62 Axis of 53, $ k
Axis from 57, 58 Ik Swivel plate 63 Axis of 59, 71 15th Stand 6k Swivel movement i6 Delivery slide 65 17th engine 66 i8
19th spindle
Tour 67
68> Spherical bearings 20th
21 Feed slide
Axis of 19 69
70> Spherical bearings 22nd engine 71 wave 23 spindle 72 Swivel movement 2k Arch guide 73 Swivel movement 25th Cradle 7k 26th Tour 75 Outer ring 27 Tool head f 76 Inner ring 28 Axis of 26 77 Retaining washer 29 engine 78 bolt 30th Axis of k 79 Approach from 20 31 Axis of 1 80 screw 32 engine 33 Worm drive 34 a * Center distance 35 guide X ■ horizontal axis Y »Horizontal axis R. »Direction of movement 51 Z »Vertical axis first handlebars Y »Pivoting movement

) Joints

) second handlebar

/ Il

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Claims (1)

GERMANY (Β) Federal Republic © Offeiileguiigsschrift (20 file number: P 3410 686.3 Registration date: 23.384 Disclosure date: 3.10. GERMAN PATENT OFFICE (§) Int. Cl. ⁴ : B23Q1 / 26 B 23 F 23/00 CD OO CO Applicant: Carl Hurth Maschinen- und Zahnradfabrik GmbH &
Co, 8000 Munich, DE Inventor: Spensberger, Johann, 8011 Poing, DE A request for examination in accordance with Section 44 PatG has been submitted @ Device for maintaining the position of a machine tool slide relative to a stationary one Machine part In a device for maintaining the position of a in a plane defined by an X and a Y axis displaceable machine tool slide relative to a stationary machine part are two symmetrical handlebar lever pairs arranged for the slide are provided, each pair consisting of two articulated, there is a right angle enclosing handlebar levers, of which one on the slide, the other is hinged to the stationary machine part. Two variants are described for the design of the joints. The application of the device can include in machines for fine gear machining. BUNDESDRUCKEREI 08.85 508 040/187 8/60